Jagr, 40, signed a one-year deal, $3.3 million deal with Philadelphia after three seasons in the KHL. The NHL's No. 1 all-time European-born scorer had 19 goals and 35 assists in 73 games this season serving as MVP candidate Claude Giroux's wingman–and as a mentor for Philadelphia's young players.

Jagr's postseason return to Pittsburgh, where he started his career and won two Stanley Cups, continues to be a focal point for the series—particularly because Jagr opted to sign with the rival Flyers last summer after negotiating with the Penguins.

Despite the long-standing, often ugly rivalry—there was a line brawl between the teams on April 1—Jagr said that he doesn't think the series will get all that rough.

"Honestly, I really don't. I could be wrong. Both teams want to go on. We don't want to kill each other," Jagr sid.

Previously, he said he's not closing the door on an eventual make-nice with the franchise—and neither are the Penguins or owner and former Jagr teammate/idol Mario Lemieux, according to the Pittsburgh-Tribune Review.

"It`s not in my control," Jagr said after the Flyers' Tuesday practice.